[Beowulf] Re: scyld and jaguar

desi star desi_star786 at yahoo.com
Mon Mar 22 15:15:27 EST 2004

Hi Mike,

Thanks much for responding. Jaguar is indeed staticaly
linked to the MPICH libraries as per manuals. When I
ran the ldd commands as you suggested:

$ ldd Jaguar
  not a dynamic executable

Thats why the very first step sugested in the Jaguar
installation is to build and configure MPICH from the
start. Where do I go from here?

I also worked on Alan's suggestion and created a
dynamic link between the ssh and rsh. I am now stuck
in making ssh passwordless. Using 'ssh-keygen -t' I
generated public and private keys and then copied
public key to the authorised_keys2 in ~/.ssh/. I am
not sure if thats all I need to make ssh passwordless.
I was wondering if I will have to copy public keys on
each node using bpcp command.

I would appreciate suggestions in this matter. Thanks.


--- Michael Will <mwill at penguincomputing.com> wrote:
> Hi,
> I saw your email on the beowulf list, and have a few
> comments:
> 1. MPICH on Scyld does not require rsh or ssh but
> rather it will take 
> advantage of the bproc features of Scyld to achieve
> the same faster.
> 2. If your fortran programs work fine, so should the
> c programs. Unless you 
> have an executable that is statically linked with
> its own mpich 
> implementation. You can test that by using 'ldd' on
> the executable, it will 
> list which libraries it is loading. If there are no
> mpich libs mentioned, you 
> might have a statically linked program. 
> Let me know how it goes.
> Michael Will
> -- 
> Michael Will, Linux Sales Engineer
> NEWS: We have moved to a larger iceberg :-)
> NEWS: 300 California St., San Francisco, CA.
> Tel:  415-954-2822  Toll Free:  888-PENGUIN
> Fax:  415-954-2899 
> www.penguincomputing.com

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